The figures do not represent the same thing in each country, depending on the extent of the screening tests carried out. Regardless of this problem, the weekly and daily trend curves allow you to get an idea of the foreseeable evolution for the next days (assuming that the screening strategy does not change over time). Respectively, it provides an indication of a possible inflection of the progression of the epidemic in the near future.
WARNING: The figures seem to be wrong on March 23, 2020.
All the graphs above are generated from the data provided by Johns Hopkins CSSE (provided to the public strictly for educational and academic research purposes).
The source code for generating the graphs is available under MIT License at https://github.com/philippe-docourt/COVID-19/blob/master/covid_19_western_europe.Rmd.
The data are provided as 2019 Novel Coronavirus COVID-19 (2019-nCoV) Data Repository by Johns Hopkins CSSE (see https://github.com/CSSEGISandData/COVID-19).
See https://github.com/philippe-docourt/COVID-19/blob/master/README.md for more details.